Idle Issues

[96WhiteNight]

I have a 96 GT with a CAI, 70 mm throttle body, Trick flow plenum, 3.55 gears, off road h, eibach's and flows. This weekend i put on a nitrous express kit and colder spark plugs. Now when i stop at a red light or stop sign the car idle's at 1500 for about 3 or 4 seconds then drops. I clean the idle control valve check the tps and maf. I put in new egr's i checked all the vacum lines nothing seems to work i recalibrated the computer twice. Still nothing anyone have any suggestions. Thanks

P.S. it didn't do it before i installed the bottle and plugs. (auto lite plugs one setting cooler for the juice)

 

[twogts4us]

Welcome! Typically this is associated with an induction upgrade, like the MAF, TB and / or plenum. Sounds like you've checked all the obvious possibilities. I doubt the plugs are part of the problem. But is it possible you have an air leak where the nitrous tube is mounted?
When I installed my plenum and TB, I reset the computer, but it took a week of driving for the idle to calm down. (It wasn't instantly fixed)

 

[96WhiteNight]

I checked where my shark nozzle goes into my CAI and thats real tight so no leaks from there. So i guess i will wait it out i reset the computer 2 days ago so i will wait and see if anything happens. Thanks

 

[Bulldog6Z6]

mine does the same thing, nobody knows how to fix it. I just leave the IAC unplugged and it runs fine, if you have a aftermarket t/b where you can manually adjust the idle you can do that.

 

[96WhiteNight]

I will give that a try just leaving off the iac does that turn your check engine light on?? I wana see if if it would change after a week like the one guy suggested but if this works im not gona complain

 

[96WhiteNight]

I just gave that a try not runnin the iac and the car didn't hang up on the rpm's like it was. But when you pushed the clutch in the rpms just droped like a carberated car. It ran to ruff for me. So i will pass on that but thanks for the idea it did work just i didn't like how the car ran.

 

[96WhiteNight]

I just replace the iac and it didn't work so i am resetting the computer once again im gona have the tps voltage checked out tomarrow hopefully that takes care of it.

 

[Turbo92PGT]

I installed a zex nitrous kit this weekend. It was idling crappy and hanging rpms at 1500 and stuff. It ended up being slight vacuum leaks from the box - fpr, and from the intake - box. You'd probably know what I'm talking about if you had a zex kit. Never had any experience with nitrous other than zex. I put some chicken wire stuff on the vacuum lines and it fixed the idle problem. I was happy. Lemme know what you find out

 

[96WhiteNight]

I installed nitrous express i like it and all its just the idle pisses me off. I don't know what you mena by the box fpr if you could get back to me i would appriciate it thanks